Thermodynamic Modeling of Crustal Melting Using Xenolith Analogs from the Cortlandt Complex, New York, USA

Emplacement of gabbroic magmas of the Cortlandt Complex, New York, induced rapid (less than 5 years) heating of pelitic schist protoliths (up to ∼1200°C at ∼0·9 GPa). Xenoliths entrained within the mafic melt experienced significant melting and melt-segregation, now represented as a series of complex fabrics and structures comprising Si-rich veins and an Al-rich, Si-poor residuum (a typical assemblage is...